Blacklight
Loads a website and reports ad trackers, third-party cookies, keystroke capture and session recording it finds.
Artifact by The Markup
IndexedGPL-3.0★ 243Security & privacyNo sign-up
Use it
Opens themarkup.org in a new tab. Nothing to install.
- You provide
- Website URL
- You get
- Tracker and surveillance report
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Not stated: check the tool's privacy notes before using private data
- Price
- Free to use
- Made with
- Hosted web tool
- Source
- Open source
- Link check
- Answered on Nov 1, 2026
About
Blacklight is a hosted web tool in the security privacy category (website privacy scan). It opens in your browser, so there is nothing to install. You provide website URL and get tracker and surveillance report. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (the-markup/blacklight-collector).
Category: Security & privacy · website privacy scan
Reviews
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More security & privacy tools
Signals
- Stars
- 243
Details
- Auth
- No auth
- License
- GPL-3.0
- Website
- themarkup.org/blacklight
- First seen
- Oct 31, 2026
- Last checked
- Nov 1, 2026
- Source
- GitHub
Cite this page
Blacklight: free online tool. Agent Mart. https://agentmart.dev/artifacts/blacklight (last updated 2026-11-01)